Translation

body defenses / resistance / host defense

Meaning

A complex network of cells, tissues, and organs that work together to defend the body against harmful invaders like bacteria, viruses, and parasites.

Examples

• A healthy immune system is essential for recovering quickly from common infections.
  健康な免疫系は、一般的な感染症から早く回復するために不可欠です。
• Stress can weaken the immune system, making a person more susceptible to illness.
  ストレスは免疫系を弱め、病気にかかりやすくさせることがあります。